/**
 * Section controls drawn on the preview, after Squarespace's editor: the hovered or selected section
 * gets a bold outline with an "Add Section" pill on each edge, a grip that drags it to a new place
 * (with a picture of it and a drop line), and a trash button. Every edit is a request to the
 * Website Builder, which owns the source.
 */
export declare function SectionCanvas(): import("react").ReactPortal | null;